Bellows



2Sheets-Sheet 1. S. G. REED.

Bellows.

(No Model Patented lab. 11, 1881.

' INVENTEIR M N PETERS. PHOTO-LITHOGRAPH S. G. REED. ZSheets -Sheet 2.

Bellows.

(N0 Model.)v

. Patented Jan. 11, 188 1.

R mm w%//// I v .16 w m fl J Z m a 7/, Lu 3 W TNEESEE jfl mww UNITEDSTATES ATENT FFICE.

SAMUEL G. REED, OF NEWTON, MASSACHUSETTS.

.BELLOWS.

SPECIFICATION forming part of Letters Patent No. 236,626, dated January11, 1881.

Application filed April 16, 1880. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL Gr. REED, of Newton, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in Bellows, of which the following is aspecification.

This improvement relates to bellows to be used mainly in the manufactureof gas, although the invention may be used to a limited extent insupplying air for some other purposes.

In my invention I provide a vertical bellows and averticalbellows-shaped receiver or closed bellows, operated by cams, both ofwhich are secured to and actuated by the same shaft, which shaft alsodrives a cam which regulates the passage of air from the bellows to thereceiver, and also actuates a fourth cam, whose purpose is to counteractor compensate for any inequality in the cam which actuates thereceiving-bellows. By means of these devices, and those connected withthem, as below described, I am enabled to produce a steady, unvaryingpressure, thus overcoming the great objection to and difficulty inbellows for usein gas-mannfacture--viz., flickerin g,which will beproduced by the slightest jerk or unevenness, or even sensation of anykind.

In the accompanying drawings, in which similar letters of referenceindicate like parts, Figure 1 is a plan view of my invention with thebellows open and the receiver closed, and the cams, &c., in their properposition. Fig. 2 is a side elevation of the cam which actuates thereceiving-bellows, detached. Fig. 3 is a detached view, showing a sideelevation of the equalizing or compensating cam with its weighted lever,&c., the section being taken on lines o t", Fig. 1. Fig.4is asectionalview, showing the device for regulating the passage of air from thebellows to the receiver. Fig. 5 is a vertical section on line w at,Fig. 1. Fig. 6 is a vertical section on line yy, Fig. 1, showing the camin elevation.

(t a are the sides, a the back, a the front, and a the bottom, of a boxinclosing and supporting my apparatus.

bis a vertical bellows secured against the back a. of the box, said backbeing usually tipped slightly forward to facilitate the opening of thebellows.

b is the opening for the admission of air.

0 is an arm hinged at 0 to the front of the bellows I), and providedwith a truck-wheel, 0", upon its under side, whichtZrests on' the edgeof the cam p. A check or stop, 0, prevents the arm 0 from dropping toofar. at is the rubber valve fitting into the opening I).

e is the receiver, and is madelike a bellows, but without opening andclapper or valve in front. In other respects it is similar to thebellows I), and is placed vertically by its side. A truck-wheel,f, issecured by means of the rod f to the front of the bellows e and rests onthe cam r.

a is the vent or outlet through which the air which haspassed throughthe bellows b and receiver 6 is conducted to the desired place.

g is a conducting-box extending beneath both the bellows I) e,connecting them by means of a number of openings, g, Fig. 5, which openinto both bellows. The portion between the bellows is, of course,closed, and is shown in enlarged section in Fig. 4. A partition, 9,separates the part beneath the bellows I) from that beyond and beneaththe receiver 6, and is provided with the "ertically-hanging valve k,provided with the wheel It" and covering the hole It in the partition. Awedge, m, held by the rod m, tixed in the lever 'It, plays verticallybetween the wheels k and l, the latter held by the horizontal bearing Z.The lever 12 (see Fig. 6) is hinged or pivoted at n to the block it, andis, by means of the roller or wheel m, raised and lowered by the cam q.

0 is the driving-shaft, and by its means are rotated the cam p, of thepeculiar shape shown in Fig. 5, which actnates the bellows I); the camg, which, through lever n and wedge m, regulates the passage of air frombellows 1) into receiver 6, (shown in Fig. 6;) the cam 4", whose shapeis shown in Fig. 2, which actuates the receiver, and the cam 8, whoseuse will be below described.

In operation, power having been applied to the shaft 0, thus rotatingthe cams, the air enters the bellows I) while it is dropping, as shownin Fig. 1. As the cam p rotates it pushes, by means of the wheel 0" andarm a, the valve (1 into the hole 1), closing the bellows gradually asthe wheel 0 mounts the cam toward its highest point. The cam q meantimeis pressing down the wheel 17/, thus lifting the other end of the levern, and hence the wedge m, allowing the valve to open and let the airthrough the conductors g into the receiving-bellows e. The cam r duringthis operation is slightly and very gradually pushing up thereceiving-bellows c. When the wheel 0 drops from the highest point p ofthe cam into the depression 1)", or a trifle before it, the wheel nrises into the depression q in the cam q, thus causing the wedge m todrop and close the valve 7:, as in Fig. 4, preventing any back fiow ofair. The wheel f, however, does not drop into its lowest point when thewheel 0 does, but passes the highest point r in its cam a trifle later,so that when the pressure is removed from the bellows bit is stillretained for an instant on the receiver a, in order to prevent theslightest sensation which might otherwise be caused by the relief ofbellows b.

It will be noticed that the pressure upon the receiver is directly fromthe shaft, and not through the bellows b. It is therefore an independentand regular action, not influenced by the action of the bellows b, andhence lessening danger of producing flickering; also, that by therelative positions and shapes of the cams p and 1' the pressure of thewind through the outlet 6 is equalized, the receiver making wind whenthe bellows I) ceases to produce wind. Again, by placing the bellows bin a vertical position great advantages are secured. The sudden drop, asin ahorizontal bellows, is avoided. There is but little resistance whenthe bellows is being collapsed, and the valve 70 hanging vertically butlittle resistance there, the lifting both of the valve and bellows beingnearly done away with. Again, the gate or wedge m is governed by theshaft, as is each of the bellows, reducing the danger of sensation(causing flickering) to a minimum.

A weight, m, is usually placed upon the lever n, in order to make itsaction more positive.

The cam r is often made in two parts and provided with cleats 1", Fig.2, so that a portion may be removed and replaced by a new section, ifdesired.

The cam s is placed upon the shaft for the purpose of compensating forany inequalities which may appear on the edge of the cam 1'.

An arm, t, is pivoted at 13', provided with a weight, t, and a wheel,16, resting on the edge of the cam s.

In case there should be some portion of the cam 1 which went a littletoo hard, a small portion of the cam 8 might be removed, as at s, tocompensate for it. If there should be a place on the cam 1" which wenttoo easy, a protuberance, 8, might be placed on the cam s. Theprotuberances placed on the edge of cam s, of which 8 is an example,tend to counteract the eifect of a too easy spot on the edge of cam r,and the removed portions 3 s on cam s tend to counteract the effect of atoo hard spot on the edge of the cam 1'. The danger is that someimperfect spot on the edge of cam 1" will affect the bellows e, which,being the bellows from which the air is directly supplied, must be veryeven and steady in its motion in order to prevent flickering orsensation, even though slight. Of course the cams, being all on'the sameshaft, should all be as nearly perfect as possible; but the greatestnecessity for perfection lies in the cam r, because this cam actsdirectly on the bellows 6.

Having thus fully described my improvement, what I claim, and desire tosecure by Letters Patent, is

1. The combination, with the "ertical bellows b, of the verticalreceiving-bellows 0 and the conductor g, provided with valve In, thesaid bellows I) being an open and the bellows e a closed bellows, eachof the ordinary oblong shape and set with its expanding end uppermost,arranged to be operated substantially as and for the purpose set forth.

2. The combination of the cam 10 1), arm 0 c, and bellows b, and the camr 4', arm and wheel ff, and receiving-bellows 0, both cams being of theshape shown and fixed to the same actuating-shaft, substantially as andfor the purpose set forth above.

3. The combination, with the bellows b e and conductor 9, having valve70, of the cams p and r and cam q, lever n, rod m, gate m, and wheels 7cl, the said cams being all actuated by the shaft 0, substantially as andfor the purpose set forth.

4:. In combination with the shaft 0, cam 1' r, and closedreceiving-bellows e, the cam s, lever 26 t, and weight t, said cam 8being fixed to shaft 0 and provided with inequalities upon its surfacefor the purpose of compensating for corresponding inequalities upon thesurface of cam a" 7', substantially as herein described.

5. In combination with the cam 19 upon the shaft 0, the vertical bellowsI), placed with its larger end up, and the hinged arm 0, for opening andclosing the air-hole 1), arranged to fall into the depressed portion ofthe cam p by its own gravity, and provided with the check 0,substantially as and for the purpose set forth.

SAMUEL G. REED.

Witnesses:

HENRY W. WILLIAMs, GEORGE V. MALLoN.

ITS

